Concrete mixer



Jan. "6, 1931. M. GILSON V 1,788,053

CONCRETE MIXER Filed Jan. 20, 1930 2 Sheets-Sheet l CZb/Wa Jan. 6, 1931. M. GILSON 1,788,053

'CONCRETE MIXER Filed Jan. 20, 1930 2 Sheets-Sheet 2 Patented Jan. 6, 1931 PATENT OFFICET MICHAEL GILSON, or rnnnonm; Wisconsin g concnnrrn: vrrxnn r Application filedvJanuary 20, 1930; Serial No.-422,075.

r This invention relates to improvements in concrete mixers.

One of the'objects of my invention is the provision of improved locking means for concrete mixers, wherein the mixing drum can be quickly and easily locked either in a charging or discharging position and when moved to a charging position will be locked against movement until releasedby the operator.

Anotherobject of my invention is the provision of a locking device for the mixing drums of concrete mixers, wherein means is provided for direct engagement with theopcrating shaft that raises the drum to dis charging position whereby to hold the drum in discharging position until released by the operator, such means being 'moved'to an oper- 5 ative position whereby to automatically lock the drum when it is returned to its normal or charging position. s I

A' further object of the invention is the provision of locking mechanism of the above character which includes a hand lever normally positioned in a substantially vertical gs'plane and provided with a notch portion adapted to be engaged byapivoted arm car ried by the drum shaft for maintaining'the drum against movement while in charged position and adapted'to be released from the lever to move the drumto dischargingposition whereby, the lever can be moved upon its pivot for engaging the lockingpin carried thereby with the locking gear carried by th drive shaft which rocks the drum. WVith the above-and other objects in view, the invention consists in the novel features of construction, the combination and arrangeto discharging position with the locking mechanism in position for locking the drum in discharging position; g f

V Figure 2 is a similar view with parts broken away illustrating the parts in position for locking the drum incharging position;

' 5O v Figure 3 isa detailed side elevation with ,Which is provided with a serrated face 9 co- 7 v a shouldered part 22 forming substantially angular faces], ,7 and. withinv this shouldered parts thereof broken away and illustrated in crosssection, M

The present inventionis applicable to Viv rious types of portable concrete mixers whereinthe drum lis rotatably mounted upon a suitable frame 2 and in the present'instance, l have illustrated onlya smallportion of the drum 1, mounted upon the supporting frame through the medium of the bearing? 5 The drum 1 is moved to discharging posi tionthrough the medium of the internal gear which carries therewith the bearing plate 5, having a serrated fiange6 and mounted upon the end of the shaft 7 is an arm 8, the end of operatingwith the serrated face on thefiange 5 for retaining this arm in various adjusted positionsrelative to thegear 4. i a

Supported upon the frame 2 is abracket 10 andextending upwardly from the upper face of the'bracket are the spaced bearing standards 11, supporting the shaft 12 tothe outer end of which is attached the hand wheel13 whichis keyedto the shaft 12 and I used for rotating this shaft.; The whee1,13 i

has attached to its rim the handle 1 1 for manually rotating the wheel; g a

Upon the inner end of theshaft 12 is a pinion ;1 5 -cooperating with internal gear 4 to .imparta tilting movement to the drum 1. i Extending laterallyfrom the bearing stand: ards 11 aregthe spaced arms 16 which. support the pin. 1'7, upon which locking lever 18 is mounted. .1 i v Lever 18 carries alaterally projecting pin 19, which is, adapted-to engage within any one of the recesses 20 formed in the perimeter of disc 21 when the drum-is in discharging position, asshown in Figure 1, for retaining the drum against further movement '9 projecting position, as shown at Figure 1.

However, when lever 18 is moved to the position for locking the, drum in discharging 7 position, this lever will assumea vertical po-, 7 s1t1on,as shown in Figure2. 7 I 1 The inner end of lever18 is provided with part, the outer end of arm 8 is adapted to be engaged,as shown in Figure 2, for locking the drum in charging position.

When the lever 18 is moved ,from a posi- 5 tion locking the drum in discharging. position to a normally unlocking position, this lever is, supported in a vertical positionv by engaging the upper faces-23 of bracket 10, then the notched portion 22 Will be in position to receive the outer end of arm 8, the

engagement of arm 8'mov1ng'lever 18' to a horizontal position, as shown in Figure 2,;

one of the recesses in the disc for retaining the drum in a discharging posit-ion, an arm movable with: the, drum, and a shouldered portion on the lever adapted to be engaged by the outer end of said arm for locking the drum in an operating position.

In: testimony thatl claim the foregoing I have hereunto set my hand at Fred-onia, in the-county of Ozaukee, and State of 'VVisconsln. Y i

V MICHAEL GILSON.

:20 manuall' "moved from a char in to a dis- 5 :chargingg-position, and wherein the drum is counter-balanced so that when it is unlocked from a dischargi-ng position, the counterbalancingof-it'he drum w ll return the-drum towardan operatingfposition, moving arm 8 into engagement \vithgtheinner end of lever 18 'andloclr'i-ng the parts, asillustra-t'ed in Figure 2, so that the drumwill be securely held in acharging position; The construc- ,3 tion of the device. is'su'ch'thatit can be easily installed and comprises a very few number of-parts so'as' toreduce the manufacturing but p'ositive.'- 7

While I have shown and described: the preferred embodiment of my inven-tfon, it 'v'villj be apparent thatslight changes may he made in the construction when putting the invention into: practice without departing V A0 from. the spirit of the: same or the scope? of the appended-claims. lc'laim: V i

1. In a deviceof theclass describecl -and Y cost,'and itsoperation is not only simple, 7

m -combination asupport, a movable mem- I r beron 'the-support, ashaft operatively connected with the drum, operating mechanism having connection with the sh-aft'for impart: mg "movement thereto, a'pivoted lever upon the support, means for operativelyponnectmg the lever wrth the opera't'lng mec'ha-n1sm for retaining the drum in adischarging position, said lever having a shouldered portion at one end and an arm carried by the shaft-and adaptedtohave one end engaged $5 with said shouldered p'ortion for lockingthe drum in a charging position.

.2. A concrete-mixer includinga support, 7 a movable member on the support, a shaft operatively connected With the drum, operatingJmechanisin-having connection- With the c shaft 'iior imparting movement thereto, intcluding a rotatable disc having spaced recess'es circumferentia'lly thereof, a pivoted lever on'thesupport, a lateral pin'carrie'd by e the leverand adapted tobe moved into any 

